Question : If each edge of a square is doubled, then the increase percentage in its area is:
Option 1: 200%
Option 2: 250%
Option 3: 280%
Option 4: 300%
Recommended: How to crack SSC CHSL | SSC CHSL exam guide
Don't Miss: Month-wise Current Affairs | Upcoming government exams
New: Unlock 10% OFF on PTE Academic. Use Code: 'C360SPL10'
Correct Answer: 300%
Solution : The area of a square = $s^2$, where $s$ is the length of a side. If the side length is doubled, the new area = $(2s)^2 = 4s^2$ The increase in area = $4s^2 - s^2 = 3s^2$ The percentage increase in area $=\frac{3s^2}{s^2} \times 100=300$% Hence, the correct answer is 300%.
Candidates can download this e-book to give a boost to thier preparation.
Application | Eligibility | Admit Card | Answer Key | Preparation Tips | Result | Cutoff
Question : The length and breadth of a rectangle are doubled. Percentage increase in area is:
Option 1: 150%
Option 2: 200%
Option 3: 300%
Option 4: 400%
Question : Let A be the area of a square whose each side is 10 cm. Let B be the area of a square whose diagonals are 14 cm each. Then (A – B) is equal to:
Option 1: 0
Option 2: 1
Option 3: 2
Option 4: 4
Question : If each side of a cube is decreased by 12%, then the percentage decrease in its surface area is:
Option 1: 25.66%
Option 2: 28.23%
Option 3: 22.56%
Option 4: 26.54%
Question : The length of each side of a rhombus is equal to the length of the side of a square whose diagonal is $40\sqrt2$ cm. If the length of the diagonals of the rhombus is in the ratio $3:4$, then its area ( in cm2) is:
Option 1: 1550
Option 2: 1600
Option 3: 1535
Option 4: 1536
Question : The area of a triangle is half the area of a square. The perimeter of the square is 172 cm. What is the area of the triangle (in cm2)?
Option 1: 924.5
Option 2: 1984
Option 3: 1849
Option 4: 992
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile